JP2005295219A - Image reading apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading apparatus capable of storing image data having both front and rear pages, even if image reading of both the front and rear pages of an original sheet cannot be normally performed. <P>SOLUTION: The control unit 15 of a composite machine 10 determines whether or not a reading error in which reading of the rear page of a sheet cannot be normally finished occurs in reading the images of both the front and rear pages of the original sheet. If the reading error occurs, the control unit 15 erases both the image data of the rear page of the original sheet and the image data of the front page of the sheet for which reading is normally finished from an image memory 18. Then, the unit 15 stores the image data of both the front and rear pages of the original sheet whose both front and rear pages are newly normally read. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image reading apparatus for reading images on both front and back pages of a document sheet.

As an apparatus for reading both the front and back pages of an original sheet, for example, there is a facsimile apparatus disclosed in Patent Document 1. In this apparatus, after the images on both the front and back pages of the original sheet are read, the image data of the sheet front page is first transmitted to the transmission destination, and then the image data of the sheet back page is transmitted to the transmission destination. If a communication error occurs during transmission of the image data on the back page of the sheet to the transmission destination, the control circuit of the facsimile apparatus retransmits the image data of the sheet front page corresponding to the back page of the sheet to the transmission destination, The image data on the back page of the sheet is transmitted again to the transmission destination.
Japanese Unexamined Patent Publication No. 2000-155671

  Therefore, in the above apparatus, if a communication error occurs during the transmission of the image data of the back sheet of the sheet, the image data of the sheet front page corresponding to the back page of the sheet is transmitted twice. That is, when a communication error occurs, only the image data of the sheet front page and the image data including the image data of both front and back pages are transmitted to the transmission destination. For this reason, the sheet front page is transmitted twice, which is not only useless, but also causes unnecessary confusion at the transmission destination.

  A first object of the present invention is to provide an image reading apparatus capable of storing image data in which both front and back pages are aligned even when image reading on both front and back pages of a manuscript sheet cannot be performed normally. is there.

  A second object of the present invention is to store image data on both front and back pages in an external storage unit even when transmission of image data on both front and back pages of an original sheet cannot be performed normally. It is an object of the present invention to provide an image reading apparatus that can be used.

  In order to achieve the above object, the invention described in claim 1 stores a reading means for reading images on both front and back pages of a manuscript sheet, and stores each image data of the read both front and back pages for each page. In an image reading apparatus provided with a storage means, a reading error detection means for detecting a reading error for the sheet back page, the sheet back page stored in the storage means based on a detection result by the reading error detection means, and And a discarding unit for discarding the image data of the front page together.

  According to the second aspect of the present invention, reading means for reading images on both front and back pages of a manuscript sheet, and transmission for transmitting each image data of the read both front and back pages to an external storage unit for each page An image reading apparatus comprising: a transmission error detecting means for detecting a transmission error for the sheet back page; and the sheet back page stored in the external storage unit based on a detection result by the transmission error detecting means; And a discarding unit for discarding the image data of the front page together.

    According to a third aspect of the present invention, there is provided reading means for reading images on both front and back pages of a document sheet, storage means for storing read image data of both front and back pages for each page, and the storage means. In the image reading apparatus provided with a transmission unit that transmits the image data of both the front and back pages of the sheet stored in the storage unit to an external storage unit for each page, a reading error detection unit that detects a reading error with respect to the sheet back page; A first discarding unit for discarding both the image data of the sheet back page and the front page stored in the storage unit based on a detection result by the reading error detection unit, and a transmission error for detecting a transmission error for the sheet back page A second breaker that discards both the sheet back page and the front page image data stored in the external storage unit based on the detection result of the detection unit and the transmission error detection unit; Characterized by comprising a means.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the first communication unit transmits the image data on both the front and back pages of the original sheet stored in the storage unit via the first network. The second communication means for transmitting the image data of both the front and back pages of the original sheet stored in the storage section via the second network, and the storage means based on the detection result by the transmission error detection means. And a third discarding unit for discarding the stored image data of the back page of the sheet and the front page of the sheet.

  According to a fifth aspect of the present invention, there is provided an image comprising reading means for reading images on both front and back pages of a manuscript sheet, and storage means for storing each image data of both the read sheet front and back pages for each page. In the reading apparatus, a reading error detection unit that detects a reading error on the sheet back page, and a back page discarding unit that discards the image data of the sheet back page stored in the storage unit based on a detection result by the reading error detection unit Means, storage control means for storing in the storage means image data of the sheet back page of the original sheet newly read by the reading means, and the newly read original sheet And a front page discarding means for discarding the image data of the sheet front page.

  According to the sixth aspect of the present invention, reading means for reading the images on both the front and back pages of the original sheet, and transmission for transmitting the read image data of both the front and back pages of the sheet to the external storage unit for each page. And an image data of the sheet back page stored in the storage unit based on a detection result by the transmission error detection unit. A back page discarding unit, a storage control unit for storing image data of a sheet back page of a document sheet newly read by the reading unit in the storage unit as image data of the sheet back page, and the new And a front page discarding means for discarding the image data of the sheet front page of the original sheet read.

  According to the first aspect of the present invention, when the image reading of both the front and back pages of the original sheet cannot be normally completed when reading the image on both the front and back pages of the original sheet, the reading is performed normally in addition to the image data of the sheet back page. Discard the image data on the sheet front page. Then, when the same original sheet is read again, the image data of the sheet front page is not stored twice. For this reason, even when the image reading on both the front and back pages of the original sheet cannot be performed normally, the image data including both the front and back pages can be stored.

  According to the second aspect of the present invention, as in the first aspect, even when the image data on both the front and back pages of the original sheet cannot be normally transmitted, the image data having both the front and back pages is externally transmitted. It can be stored in the storage unit.

According to the invention described in claim 3, the operation and effect of the invention described in claim 1 and claim 2 can be obtained.
According to the fourth aspect of the present invention, the image data read from both the front and back pages of the original sheet is transmitted via the first network by the first communication means, and the second communication means is transmitted via the second network. The sheet document of the document sheet transmitted by the first communication unit can be matched with the sheet document of the document sheet transmitted by the second communication unit.

  According to the fifth aspect of the present invention, when the image reading of both the front and back pages of the original sheet cannot be completed normally, the image data on the back page of the sheet is discarded and the reading is performed normally. The image data of the sheet front page is stored. When the same original sheet is read again, the image data on the back side of the sheet is combined with the image data on the front and back pages of the sheet to obtain image data on both the front and back pages of the same original sheet. For this reason, even when the image reading on both the front and back pages of the original sheet cannot be performed normally, the image data including both the front and back pages can be stored.

  According to the sixth aspect of the present invention, as in the fifth aspect, even when the image data on both the front and back pages of the original sheet cannot be normally transmitted, the image data having both the front and back pages is externally transmitted. It can be stored in the storage unit.

  Hereinafter, an embodiment in which an image reading apparatus according to the present invention is embodied in a multifunction machine having a printer function, a copy function, a facsimile function, and a scanner function will be described with reference to FIGS.

As shown in FIG. 1, an external terminal 12 is connected to an MFP 10 as an image reading apparatus via a LAN with an option board 11.
The MFP 10 includes a control unit 15 having an MPU 13 and a ROM 14, a RAM 16, a reading unit 17, an image memory 18 as a storage means, a codec 19, a recording unit 20, a display unit 21, an operation unit 22, a modem 23, and an NCU (Network Control Unit) 24. Each unit 15 to 24 is connected via a bus 25. In the present embodiment, the control unit 15 constitutes a discard unit, a transmission unit, a transmission error detection unit, a first discard unit, and a second discard unit. Further, the control unit 15 and the reading unit 17 constitute reading means, and the control unit 15 and the image memory 18 constitute storage means. In addition, the control unit 15 and the NCU 24 constitute first communication means, and the option board 11 is second communication means.

  The MPU 13 controls each component of the multifunction machine 10. The ROM 14 stores a program for controlling the multifunction machine 10. The RAM 16 temporarily stores various information related to the multifunction machine 10.

  As will be described later, the reading unit 17 includes a scanner, an automatic document feeder, and the like. The reading unit 17 reads the images on both the front and back pages of the document sheet and outputs the image signal. The image memory 18 temporarily stores image data of a document sheet read by the reading unit 17 and data received by facsimile as image data. The codec 19 compresses and encodes image data for facsimile transmission / reception and the like. The recording unit 20 is composed of an electrophotographic printer, and records image data read by the reading unit 17 and image data received by facsimile on a recording sheet.

  The display unit 21 includes a liquid crystal display, and displays various information indicating the operation state of the multifunction machine 10. The operation unit 22 includes a numeric keypad (including * and # keys) for inputting a telephone number, registration of abbreviated number, abbreviated key for calling from the abbreviated number, and a start button 22a for starting a document sheet reading operation. , Various operation keys such as a communication / copy key for setting a “communication (FAX)” operation or a “copy” operation.

  The modem 23 modulates transmission data and demodulates reception data based on a facsimile transmission control procedure. The NCU 24 controls the connection with the public telephone line, and has a function of transmitting a dial signal corresponding to the telephone number of the other party and a function of detecting an incoming call.

  The option board 11 is a LAN interface board for connecting the MFP 10 to a LAN, and includes an MPU 30, a ROM 31, a RAM 32 (external) storage unit, and a LAN interface 33. The units 30 to 33 are communicably connected to the units of the multifunction machine 10 via the bus 34. That is, the RAM 34 of the option board 11 is connected to the image memory 18 of the multifunction machine 10 via the buses 34 and 25.

  The MPU 30 performs control of each part of the option board 11 and communication processing between the multifunction machine 10 and the external terminal 12 according to a program stored in the ROM 31. The RAM 32 temporarily stores various data acquired as the operation of the option board 11 is performed. The RAM 32 temporarily stores image data that is compressed and encoded by the codec 19 of the multifunction machine 10 and then transmitted to the option board 11 as will be described later.

  The external terminal 12 acquires the image data of the original sheet stored in the RAM 32 of the option board 11 via the LAN. This image data is stored in the memory 12 a of the external terminal 12.

The mechanical configuration of the reading unit of the multifunction machine 10 will be described in detail.
As shown in FIG. 2, a document feeding unit 41, a stationary document placing unit 42, and a document reading mechanism unit 43 are installed on the upper part of the multifunction machine 10. The document feeding unit 41 forms a transport path T for transporting a plurality of document sheets when the images on both the front and back sides are read continuously. The stationary document placement unit 42 places the document sheet when reading a still image from the document sheet. Although not shown in FIG. 2, a well-known recording paper supply unit, the recording unit 20, and a recording paper discharge unit are installed in the lower part of the multifunction machine 10.

  The document feeder 41 includes a document table 44 for placing a plurality of document sheets before reading in a stacked state, and a document discharge table 45 for mounting document sheets after reading in a stacked state. Is equipped. A section between the document feed port of the document table 44 and the document discharge port of the document discharge table 45 is a conveyance path T for continuously conveying the plurality of document sheets.

  A shutter 46 that can be opened and closed is disposed in the vicinity of the document feed port of the document table 44 so as to contact the front ends of a plurality of document sheets placed on the document table 44. On the upstream side of the shutter 46, a pickup roller 47 for sending a plurality of document sheets on the document table 44 sequentially from the uppermost document sheet to the transport path T side is disposed. On the downstream side of the shutter 46, a separation roller 48 and a separation pad 48a for separating the original sheets sent through the shutter 46 by the pickup roller 47 one by one and feeding them into the conveyance path T are disposed. ing.

  On the downstream side of the separation roller 48 of the document feeding section 41, a registration roller 49, a first feeding roller 50, a second feeding roller 51, a front surface reading roller 52, a third feeding roller 53, and a rear surface reading roller. A roller 54 and a fourth feeding roller 55 are arranged along the transport path T in the order of transporting the original sheets. Among these rollers 49 to 55, the registration rollers 49, the first feeding roller 50, the second feeding roller 51, the third feeding roller 53, and the fourth feeding roller 55 include idle rollers 49a, 50a, 51a, 53a, and 55a are arranged in contact with each other. Each of the rollers 47 to 55 from the pickup roller 47 to the fourth feeding roller 55 is operatively connected to one stepping motor 56 shown in FIG.

  As shown in FIG. 2, a contact image sensor 59 is disposed at a position corresponding to the back surface reading roller 54. Further, between the pickup roller 47 and the shutter 46, there is provided a document presence / absence detection sensor DS1 for detecting the presence / absence of a document sheet in contact with the shutter 46. Between the separation roller 48 and the registration roller 49, a position near the separation roller 48 is provided with a first document edge detection sensor DSS that detects the edge of the document sheet being conveyed. Further, a registration sensor DRS for detecting that the front end of the document sheet has come into contact with the registration roller 49 is provided in the vicinity of the registration roller 49. Between the first feeding roller 50 and the second feeding roller 51, a position near the second feeding roller 51 is provided with a second document end detection sensor DS2 that detects an end portion of the document sheet being conveyed. ing. Between the third feeding roller 53 and the back surface reading roller 54, a third document edge detection sensor DS3 for detecting the edge of the document sheet being conveyed is provided.

  As shown in FIG. 2, the stationary document placing portion 42 is provided with a transparent document placing plate 60 for placing a document sheet on the upper surface, and on the document placing plate 60 so as to be openable and closable. A presser lid 61 is provided. The document table 44 and the document discharge table 45 of the document feeding unit 41 are disposed on the presser lid 61 of the stationary document loading unit 42. A lid opening / closing sensor 58 for detecting whether or not the presser lid 61 is closed on the document placing plate 60 is provided below the document placing plate 60. In the present embodiment, the control unit 15, the lid opening / closing sensor 58, the first document edge detection sensor DSS, the second document edge detection sensor DS2, and the third document edge detection sensor DS3 constitute a reading error detection means.

  The document reading mechanism 43 is equipped with a translucent plate 62, a lamp 63, a first mirror 64, a second mirror 65, a third mirror 66, a condensing lens 67, and an image sensor 68. The translucent plate 62 is disposed opposite to the surface reading roller 52 of the document feeding unit 41. The lamp 63 irradiates the original sheet passing on the translucent plate 62 or the original sheet placed on the original placing plate 60 with light. First to third mirrors 64 to 66 change the optical path of the reflected light from the document sheet. The condensing lens 67 converges the light from the third mirror 66 on the image sensor 68. The image sensor 68 reads an image of the original sheet based on the light incident through the condenser lens 67 and outputs an image signal of the read original sheet.

  The lamp 63 and the first mirror 64 are supported on a first carriage 69 that can move in the sub-scanning direction. Further, the second and third mirrors 65 and 66 are supported on a second carriage 70 that is also movable in the sub-scanning direction. The first carriage 69 is moved at twice the moving speed of the second carriage 70 by a known moving mechanism (not shown).

  As a result, during continuous conveyance of a plurality of document sheets by the document feeding unit 41, the first and second carriages 69 and 70 are moved from the standby position P1 set at substantially the center of the movement range of the translucent plate 62. It is moved and arranged at a reading position P2 that is positioned directly opposite. Further, when reading an image of a document sheet placed on the stationary document placement unit 42, both carriages 69 and 70 are positioned at a position P 3 that is positioned directly below the end of the document placement plate 60 on the side of the document feeding unit 41. Then, it is moved between a position P4 facing the position directly below the opposite end of the document placing plate 60.

  The document feeder 41 and the document reading mechanism 43 configured as described above constitute an automatic document reader (ADF), and the first and second carriages 69 and 70 are arranged at the reading position P2. Then, the image on the original sheet passing on the translucent plate 62 is read. Further, the stationary document placing portion 42 and the document reading mechanism portion 43 constitute a flat bed scanner (FBS), and both the carriages 69 and 70 are moved from the position P3 to the position P4 on the document placing plate 60. The image on the placed original sheet is read.

  As shown in FIG. 3, the sensors DS 1, DSS, DRS, DS 2, DS 3 and the lid opening / closing sensor 58 are electrically connected to the input side of the control unit 15. The stepping motor 56 and the lamps 59a and 63 are electrically connected to the output side of the control unit 15.

Next, the operation of the MFP 10 configured as described above will be described.
When the image data read by the automatic document reader of the reading unit 17 is transmitted to the option board 11 in order to use the multifunction machine 10 as a network scanner, the flowchart of FIG. 5 is performed based on the control of the MPU 13. The process shown in FIG. This process proceeds by executing a program in the ROM 14 under the control of the MPU 13.

  First, in step (hereinafter abbreviated as S) 100, the MPU 13 detects whether or not there is an unread document sheet on the document table 44 based on the detection result of the document presence / absence detection sensor DS1.

  In next step S <b> 101, the MPU 13 controls the automatic document reader of the reading unit 17 to convey one original sheet from the original table 44 along the conveyance path T. Then, the image of the front page of the document sheet being conveyed is read by the image sensor 68 and the image data is stored in the image memory 18, and the image of the back page of the document sheet is read by the contact image sensor 59. Data is stored in the image memory 18. The image data of the front page of the original sheet and the image data of the back page of the sheet are stored in the image memory 18 separately for each original sheet and front and back page. At this time, if the document sheet is a general-purpose size (for example, A4), reading of the image on the back page by the contact image sensor 59 is started while the image sensor 68 reads the image on the front page. This is determined by the distance between the image sensor 68 and the contact image sensor 59 in the transport path T.

  In next step S102, the MPU 13 determines whether or not reading of the images on both the front and back pages is completed based on the transport position in the transport path T of the original sheet. The document sheet transport position on the transport path T is determined based on the positions on the document sheet transport path T when the leading edge and the trailing edge of the document sheet are detected by the document edge detection sensors DSS, DS2, and DS3. This is grasped based on the number of driving steps of the stepping motor 56 when the document sheet is conveyed. The completion of reading the front page of the original sheet is recognized when the rear end of the original sheet is detached from the image sensor 68. Further, the completion of reading the back page of the document sheet is recognized when the trailing edge of the document sheet has come off the contact image sensor 59.

  When YES in S102, the MPU 13 transmits the image data of both the front and back pages of the original sheet stored in the image memory 18 to the RAM 32 of the option board 11 in S103. At this time, the MPU 13 first transmits the image data of the front page of the original sheet, and when the transmission of the image data of the front page is completed, next, the image data of the back page of the original sheet is transmitted. Then, the MPU 13 causes the MPU 30 of the option board 11 to store the image data of both the front and back pages of the original sheet in the RAM 32 for each page.

  In step S <b> 104, the MPU 13 determines whether all the image data on both the front and back pages of the original sheet stored in the image memory 18 has been transmitted to the RAM 32 of the option board 11. If YES in S104, the MPU 13 returns to S100 and repeats the above processing.

  When the image data of both the front and back pages of all the original sheets is transmitted to the RAM 32 of the option board 11, the MPU 13 ends this processing. The image data of both the front and back pages of the original sheet stored in the RAM 32 is captured by the external terminal 12 connected to the LAN and then displayed on the display unit of the external terminal 12 or printed out by another printer. .

  On the other hand, if NO in S102, the MPU 13 determines whether or not a reading error has occurred in S105, in which image reading on both the front and back pages of the original sheet cannot be completed normally. As one of the determinations as to whether or not this reading error has occurred, the MPU 13 determines whether or not the presser lid 61 is closed based on the detection result of the lid opening / closing sensor 58. As another determination, the MPU 13 monitors the remaining memory capacity of the image memory 18 and determines whether or not a memory overflow occurs in the image memory 18 storing image data. As another determination, the MPU 13 normally conveys the original sheet based on the detection timing of the front and rear ends of the original sheet by the original end detection sensors DSS, DS2, and DS3 and the number of driving steps of the stepping motor 56. It is determined whether or not there is a paper jam (jam). Then, the MPU 13 determines that an image reading error of the original sheet has occurred when the presser lid 61 is opened, a memory over in the image memory 18 occurs, or a paper jam occurs in the original sheet.

  When YES is obtained in S105, the MPU 13 erases the image data read from the original sheet currently being read and stored in the image memory 18 in S106. More specifically, at this time, the MPU 13 reads the front page of the original sheet when reading the image on the front page and before reading the back page image of the original sheet. The image data on the front page of the original sheet stored in the image memory 18 is deleted. Further, when the reading error occurs at the same time that the front and back pages of the original sheet are being simultaneously read, the MPU 13 reads the front and back pages of the original sheet and stores them in the image memory 18 so far. Erase the image data on both pages. Further, when the reading error occurs when the image reading of the front page of the manuscript sheet has been normally completed and the image on the back page of the manuscript sheet is being read, the MPU 13 In addition to the image data read from the back page of the document and stored in the image memory 18, the image data of the front page of the document sheet already read and stored in the image memory 18 is also deleted. More specifically, as shown in FIG. 4A, for example, when a reading error occurs while reading the back page of the third original sheet, the third original sheet is normally operated. Not only the image data of the back page that could not be read, but also the image data of the front page of the original sheet is erased. In S106, the MPU 13 performs a display on the display unit 21 to notify the user that a reading error has occurred.

  Next, the MPU 13 determines whether or not the reading error has been resolved in S107. When the reading error is resolved, the MPU 13 controls the display unit 21 in S108 to prompt the user to set the original sheet on which the reading error has occurred on the original table 44 and press the start button 22a. Display.

  In the next S109, the MPU 13 determines whether or not the start button 22a has been pressed for rereading. If YES in S109, the MPU 13 returns to S100 and repeats the process. Therefore, in the case shown in FIG. 4 (a), when the images of both the front and back pages of the third original sheet are read normally again, the image data read on both the front and back pages of the sheet at this time is changed to the third sheet. It is stored in the image memory 18 as front and back page image data of the original sheet.

  If NO in S104, the MPU 13 causes a transmission error in the next S110 in which the image data of both the front and back sheets cannot be normally transmitted from the image memory 18 of the multifunction machine 10 to the RAM 32 of the option board 11. Determine whether or not. The occurrence of this transmission error is determined based on, for example, the result of the MPU 30 of the option board 11 performing a parity check on the image data.

  If YES in S110, the MPU 13 stops transmitting image data from the image memory 18 to the option board 11 in S111, and instructs the MPU 30 of the option board 11 to transmit the image already transmitted to the RAM 32 of the option board 11. Erase the data. More specifically, at this time, if the transmission error occurs when the image data of the sheet front page is being transmitted, the MPU 13 transmits the image data from the image memory 18 and stores it in the RAM 32 until then. Erase the image data on the front page. In addition, when the transmission error occurs when the image data on the back page of the sheet is being transmitted, the MPU 13 transmits the image data on the back page of the original sheet that has been transmitted from the image memory 18 to the RAM 32 and stored so far. In addition, the image data of the front page of the original sheet that has already been transmitted from the image memory 18 and stored in the RAM 32 is also deleted.

After executing S111, the MPU 13 executes S108.
As described above, in this embodiment, when the image data read from the images on both the front and back pages of the original sheet is stored in the image memory 18, the image reading on the back page of the sheet is not completed normally. In addition to the image data of the sheet back page that was not normally stored, the image data of the sheet front page that was normally stored is also erased. The image data of both the front and back pages is stored in the image memory 18 only when both the front and back pages of the original sheet are normally read. Therefore, even when image reading on both the front and back pages of the original sheet cannot be performed normally, image data including both front and back pages can be stored in the image memory 18.

  In this embodiment, when the image data of both the front and back pages of the original sheet stored in the image memory 18 is transmitted from the multi-function peripheral 10 to the option board 11, the transmission of the image data of the back sheet of the sheet is normally completed. If not, in addition to the image data of the sheet back page that was not normally transmitted, the image data of the sheet front page that was normally transmitted is also erased. The image data for both the front and back pages is stored in the option board 11 only when the image data for both the front and back pages of the original sheet are transmitted normally. Therefore, even when the image data on both the front and back pages of the original sheet cannot be normally transmitted, the image data having both the front and back pages can be stored in the RAM 32 of the option board 11. For this reason, when a network scan using the multifunction device 10 is performed by the external terminal 12 connected to the multifunction device 10 via a LAN, image data of only the sheet front page is transmitted from the multifunction device 10 to the external terminal 12. It will not be done. That is, when the image data of the original sheet is printed out by another printer at the external terminal 12 that has acquired the image data of the original sheet from the multifunction machine 10, only the front page is not printed. The page is printed. In addition, when the external terminal 12 displays the acquired image data of a plurality of document sheets on the display unit of the external terminal 12, only the front page is not displayed, and both the front and back pages are aligned. Display is made.

The present invention is not limited to the embodiment described above, and may be embodied as follows.
The present invention may be implemented when image data of both front and back pages of a document sheet read by the multifunction device 10 is stored in the image memory 18 of the multifunction device 10 when transmitting image data of the document sheet by facsimile. Good. Further, it may be carried out when image data of both front and back pages of a document sheet is accumulated in copying.

  -You may implement this invention as follows. That is, the image data of both the front and back pages of the original sheet stored in the image memory 18 is transmitted by the NCU 24 via the public telephone line (first network), and the image transmitted from the image memory 18 to the RAM 32 of the option board 11. You may implement when transmitting data via LAN (2nd network). In this case, when a reading error of the sheet back page occurs during image reading of both the front and back pages of the original sheet, the control unit 15 (first discarding unit) causes the image data of the sheet back page and the image of the sheet front page. Data is discarded from the image memory 18. When a sheet back page transmission error occurs during transmission of image data from the image memory 18 to the option board 11, the control unit 15 (second discarding unit) causes the image data of the back page of the sheet and its sheet table to be displayed. The page image data is discarded from the RAM 32. At the same time, when the transmission error occurs, the control unit 15 (third discarding unit) discards the image data of both the front and back pages of the document sheet in which the transmission error has occurred from the image memory 18. For this reason, even if a transmission error occurs when image data on the back side of the sheet is transmitted from the image memory 18 to the option board 11, the image data on both the front and back pages of the original sheet is transferred from the RAM 32 of the option board 11. Discarded and never stored in the image memory 18. Therefore, according to such a configuration, when performing mixed broadcast transmission in which front and back image data of the same document sheet is transmitted by fax communication and mail communication, a document sheet sent by fax communication and a document sent by mail communication The sheet can be matched. Then, when both the front and back pages of the document sheet in which the transmission error has occurred are read again, it is possible to prevent the image data of both the front and back pages of the same document sheet from being transmitted twice in the fax communication.

  -You may embody this invention as follows. That is, when the image reading of the back page of the sheet does not end normally, the control unit 15 as the back page discarding unit, the storage control unit, and the front page discarding unit discards only the image data of the sheet back page, The image data of the sheet front page that has been normally read is stored in the image memory 18 (or RAM 32 (external storage unit)) as it is. When the front and back pages of the original sheet are read normally again, the control unit 15 discards the image data of the front and back pages of the sheet, and also converts the image data of the back side of the sheet into the back page of the original sheet. The image data may be stored in the image memory 18 (or RAM 32). More specifically, as shown in FIG. 4B, when reading both the front and back pages of the third original sheet, if the reading of the back and back pages of the sheet could not be completed normally, the image data of the sheet front and back pages Is stored as the front page image data of the third original sheet, and only the image data of the back page of the sheet is discarded. When the third original sheet is read again, the image data of the sheet front page is discarded, and the image data of the back page of the sheet is stored as the back page image data of the third original sheet.

1 is a block diagram illustrating a multifunction machine according to an embodiment. FIG. 3 is a longitudinal sectional view showing a reading unit of the multifunction machine. The block diagram which shows an electrical structure. (A) is explanatory drawing which shows the memory | storage process of the image data of each front and back page in one Embodiment, (b) is explanatory drawing which shows the memory | storage process of the image data of each front and back page in other embodiment. 6 is a flowchart illustrating a document sheet reading operation and an image data processing operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Multi-function device as an image reading device, 11 ... Option board as second communication means, 15 ... Reading means, storage means, reading error detection means, first communication means, discarding means, transmission means, transmission error Detection means, first discarding means, second discarding means, third discarding means, back page discarding means, storage control means and control section as front page discarding means, 17... Reading section constituting reading means, 18... Storage means 24... NCU constituting the first communication means, 32... RAM as the (external) storage unit, 58... Lid opening / closing sensor constituting the reading error detecting means, DS 2. DS3... Third document edge detection sensor, DSS... First document edge detection sensor.

Claims (6)

Reading means for reading images on both front and back pages of a manuscript sheet;
In an image reading apparatus comprising storage means for storing each image data of both the read sheet front and back pages for each page,
A reading error detecting means for detecting a reading error for the back page of the sheet;
An image reading apparatus comprising: a discarding unit for discarding both the image data of the sheet back page and the front page stored in the storage unit based on a detection result by the reading error detection unit. Reading means for reading images on both front and back pages of a manuscript sheet;
In an image reading apparatus provided with transmission means for transmitting each image data of both the read sheet front and back pages to an external storage unit for each page,
A transmission error detecting means for detecting a transmission error with respect to the back side of the sheet;
An image reading apparatus comprising: discarding means for discarding the image data of the back page of the sheet and the front page stored in the external storage unit based on the detection result by the transmission error detection means. Reading means for reading images on both front and back pages of a manuscript sheet;
Storage means for storing each image data of the read sheet front and back pages for each page;
In an image reading apparatus comprising: a transmission unit that transmits image data of both front and back pages of the sheet stored in the storage unit to an external storage unit for each page;
A reading error detecting means for detecting a reading error for the back page of the sheet;
A first discarding unit for discarding both the image data of the sheet back page and the front page stored in the storage unit based on a detection result by the reading error detection unit;
A transmission error detecting means for detecting a transmission error with respect to the back side of the sheet;
An image reading comprising: a second discarding unit for discarding the image data of the sheet back page and the front page stored in the external storage unit based on a detection result by the transmission error detection unit. apparatus. First communication means for transmitting the image data of both the front and back pages of the original sheet stored in the storage means via a first network;
Second communication means for transmitting the image data of both the front and back pages of the original sheet stored in the storage unit via a second network;
4. The apparatus according to claim 3, further comprising: a third discarding unit that discards both the sheet back page and the front page image data stored in the storage unit based on a detection result by the transmission error detection unit. The image reading apparatus described. Reading means for reading images on both front and back pages of a manuscript sheet;
In an image reading apparatus comprising storage means for storing each image data of both the read sheet front and back pages for each page,
A reading error detecting means for detecting a reading error with respect to the back side of the sheet;
A back page discarding unit for discarding the image data of the sheet back page stored in the storage unit based on a detection result by the reading error detection unit;
Storage control means for storing the image data of the sheet back page of the original sheet newly read by the reading means in the storage means as image data of the sheet back page;
An image reading apparatus comprising: a front page discarding unit that discards image data of a sheet front page of the newly read original sheet. Reading means for reading images on both front and back pages of a manuscript sheet;
In an image reading apparatus provided with a transmission means for transmitting each image data of the read sheet front and back pages for each page to an external storage unit,
A transmission error detecting means for detecting a transmission error with respect to the back side of the sheet;
A back page discarding unit for discarding the image data of the sheet back page stored in the storage unit based on a detection result by the transmission error detection unit;
Storage control means for storing the image data of the sheet back page of the original sheet newly read by the reading means in the storage unit as image data of the sheet back page;
An image reading apparatus comprising: a front page discarding unit that discards image data of a sheet front page of the newly read original sheet.

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